/* Copyright (C) 1990, 1996 Aladdin Enterprises.  All rights reserved.
  
  This file is part of Aladdin Ghostscript.
  
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  or distributor accepts any responsibility for the consequences of using it,
  or for whether it serves any particular purpose or works at all, unless he
  or she says so in writing.  Refer to the Aladdin Ghostscript Free Public
  License (the "License") for full details.
  
  Every copy of Aladdin Ghostscript must include a copy of the License,
  normally in a plain ASCII text file named PUBLIC.  The License grants you
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*/

/* ibnum.h */
/* Interface to Level 2 number readers */
/* Requires stream.h */

/* Define the byte that begins an encoded number string. */
/* (This is the same as the value of bt_num_array in btoken.h.) */
#define bt_num_array_value 149

/* Homogenous number array formats. */
/* The default for numbers is big-endian. */
#define num_int32 0			/* [0..31] */
#define num_int16 32			/* [32..47] */
#define num_float 48
#define num_float_IEEE num_float
#define num_float_native (num_float + 1)
#define num_msb 0
#define num_lsb 128
#define num_is_lsb(format) ((format) >= num_lsb)
#define num_is_valid(format) (((format) & 127) <= 49)
/* Special "format" for reading from an array. */
/* num_msb/lsb is not used in this case. */
#define num_array 256
/* Define the number of bytes for a given format of encoded number. */
extern const byte enc_num_bytes[]; /* in ibnum.c */
#define enc_num_bytes_values\
  4, 4, 2, 4, 0, 0, 0, 0,\
  4, 4, 2, 4, 0, 0, 0, 0,\
  sizeof(ref)
#define encoded_number_bytes(format)\
  (enc_num_bytes[(format) >> 4])

/* Read from an array or encoded number string. */
int	num_array_format(P1(const ref *));	/* returns format or error */
uint	num_array_size(P2(const ref *, int));
int	num_array_get(P4(const ref *, int, uint, ref *));

/* Decode a number from a string with appropriate byte swapping. */
int	sdecode_number(P3(const byte *, int, ref *));
short	sdecodeshort(P2(const byte *, int));
long	sdecodelong(P2(const byte *, int));
float	sdecodefloat(P2(const byte *, int));